Powder Inhaler

Abstract

The invention consists of a powder inhalator for administrating medications. The inhalator, according to the invention, has a chamber with a mechanism for opening the medication capsule and an aerodynamic chamber in which the medication particles are separated from the currier capsules. In the aerodynamic chamber. On the opposite side to the mouthpiece opening, there are air inlet ducts which form a multidirectional system of air ducts. The air ducts are shaped in a way which makes the air that flows through them create at least three streams. Due to the intersecting of the air streams the air flow is strongly turbulent even if low speeds are involved. Consequently the separation of the active substance particles form the carrier surface is very effective.

1 . An inhalator for inhaling powdered medications with an aerodynamic chamber in which the inhalation powder is placed, wherein there are ducts which transmit the drawn in air streams into the aerodynamic chamber from at least three directions from the side opposite to the outlet of the aerodynamic chamber which ends in a mouthpiece, and the air streams are crossing in the aerodynamic chamber. 
   
   
       2 . An inhalator according to  claim 1 , wherein the air stream that flows into the aerodynamic chamber from the axially opposite direction to the mouthpiece outlet is the main air stream. 
   
   
       3 . An inhalator according to  claim 2 , wherein on both sides of the main air stream there are side air streams. 
   
   
       4 . An inhalator according to  claim 3 , wherein the side air streams and the axis of the main air stream form an acute angle. 
   
   
       5 . An inhalator according to  claim 4 , wherein the axis of the main air stream lies in a surface which is diagonal to the surface on which the inhalation powder is placed. 
   
   
       6 . An inhalator according to  claim 2 , wherein the main air stream and the surface on which the inhalation powder is placed form an angle between 5 and 75°. 
   
   
       7 . An inhalator according to  claim 6 , wherein the side air streams are transmitted to the aerodynamic chamber from the sides and form an angle between 5 and 75° with the axis of the main air stream. 
   
   
       8 . An inhalator according to  claim 7 , wherein the air streams intersect at a point which is not further than the place where the medication powder is contained. 
   
   
       9 . An inhalator according to  claim 7 , wherein the air streams intersect at point where the medication powder is contained. 
   
   
       10 . An inhalator according to  claim 9 , wherein the air streams intersect before the place where the medication powder is contained. 
   
   
       11 . An inhalator according to  claim 10 , wherein the air is transmitted through ducts and wherein the ratio of the total cross sections of the ducts, which transmit the main air stream to the total cross sections of the ducts which transmit the air into the side streams is between 0.5 and 2. 
   
   
       12 . An inhalator according to  claim 11 , wherein the total cross sections of all the ducts which transmit air into the aerodynamic chamber are lower than or equal to the cross section of the surface of the aerodynamic chamber outlet.